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-rw-r--r--libexec/casper/random/random.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/libexec/casper/random/random.c b/libexec/casper/random/random.c
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+++ b/libexec/casper/random/random.c
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+/*-
+ * Copyright (c) 2012-2013 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Pawel Jakub Dawidek under sponsorship from
+ * the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/nv.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <libcapsicum.h>
+#include <libcasper.h>
+#include <pjdlog.h>
+
+#define MAXSIZE (1024 * 1024)
+
+static int
+random_command(const char *cmd, const nvlist_t *limits, nvlist_t *nvlin,
+ nvlist_t *nvlout)
+{
+ void *data;
+ size_t size;
+
+ if (strcmp(cmd, "generate") != 0)
+ return (EINVAL);
+ if (!nvlist_exists_number(nvlin, "size"))
+ return (EINVAL);
+
+ size = (size_t)nvlist_get_number(nvlin, "size");
+ if (size == 0 || size > MAXSIZE)
+ return (EINVAL);
+
+ data = malloc(size);
+ if (data == NULL)
+ return (ENOMEM);
+
+ arc4random_buf(data, size);
+
+ nvlist_move_binary(nvlout, "data", data, size);
+
+ return (0);
+}
+
+int
+main(int argc, char *argv[])
+{
+
+ /*
+ * TODO: Sandbox this.
+ */
+
+ return (service_start("system.random", PARENT_FILENO, NULL,
+ random_command, argc, argv));
+}
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